Stainless steel 455 is a martensitic, age-hardenable alloy yielding strength characteristics that are roughly 3 times the strength of standard 304 stainless. 445 resists staining in normal atmospheres and shows no corrosion in fresh water, good ductility and toughness. This alloy is extremely stable during heat-treating making it able to be machined to close tolerance prior to aging.
Type 403 stainless is a corrosion and heat resistant 12% Cr martensitic alloy, very similar to stainless type 410, with the exception of a slightly lower maximum silicon content and a slightly lower maximum chromium content. Good levels of strength, toughness and ductility may be obtained with this alloy.
17-7 stainless steel is a stable, chromium-nickel-aluminum precipitation hardened stainless steel that provides high strength and hardness, excellent fatigue properties, moderately resistant to corrosion, good formability, and minimum distortion upon heat treatment.
Stainless 422 is a hardenable, martensitic stainless steel with better strength at higher temperatures as high as 1200 F. It is capable of being heat treated to various high strength levels.
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